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1、BRITISH STANDARD AEROSPACE SERIES BS S 537:1970 Incorporating Amendment No. 1 Specification for low carbon 17/12 chromium- nickel-molybdenum corrosion-resisting steel sheet and strip (500 MPa) UDC 629.7:669.15262428:669.14.018.8-41 ? Licensed Copy: London South Bank University, London South Bank Uni
2、versity, Sat Dec 09 03:06:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS S 537:1970 This British Standard, having been approved by the Aerospace Industry Standards Committee, was published under the authority of the Executive Board of the Institution on 27 January 1970 BSI 30 May 2003 The followin
3、g BSI references relate to the work on this standard: Committee reference ACE/15 Draft for comment 69/2003 ISBN 0 580 05935 9 Amendments issued since publication Amd. No.DateComments 1414330 May 2003Indicated by a sideline Licensed Copy: London South Bank University, London South Bank University, Sa
4、t Dec 09 03:06:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS S 537:1970 BSI 30 May 2003 i Contents Page Forewordii 1Inspecting and testing procedure1 2Process of manufacture1 3Chemical composition1 4Surface dressing1 5Condition1 6Final heat treatment1 7Mechanical properties1 8Intercrystalline cor
5、rosion test2 9Microscopic examination for freedom from surface contamination2 10Retests2 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS S 537:1970 ii BSI 30 May 2003 Foreword This publication does not purpo
6、rt to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pa
7、ges 1 and 2, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Sidelining in this document indicates the most recent changes by amendment. Licensed Copy: London South Bank University, London South Bank University,
8、Sat Dec 09 03:06:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS S 537:1970 BSI 30 May 2003 1 1 Inspecting and testing procedure 1.1 This British Standard shall be used in conjunction with the relevant sections of the latest edition of BS S 500. 1.2 The thickness of the material shall be in accorda
9、nce with the latest edition of BS S 500. Material which has been finally hot-rolled prior to softening shall satisfy the tolerances applicable to hot-rolled sheet and strip. Material which has been finally cold-rolled prior to softening shall satisfy the tolerances applicable to cold-rolled sheet an
10、d strip. 1.3 Sulphur printing or deep etching tests. Samples shall be selected in accordance with the latest edition of BS S 500. 2 Process of manufacture The material shall be manufactured by an electric process unless otherwise agreed between the manufacturer and the purchaser in accordance with t
11、he latest edition of BS S 500. 3 Chemical composition The steel shall contain: 4 Surface dressing The material shall be overall dressed in accordance with the requirements of the latest edition of BS S 500. 5 Condition The material shall be supplied in the softened condition. 6 Final heat treatment
12、Softening shall be carried out by heating at a temperature between 1 000 C and 1 100 C and cooling in air or quenching in oil or water. 7 Mechanical properties The mechanical properties obtained from test pieces selected and prepared in accordance with the relevant requirements of the latest edition
13、 of BS S 500 shall comply with the following: 1) Tensile test. 2) Hardness test. The hardness of the material shall be not more than 170 HB or 180 HV. 3) Single bend test. The test piece shall be bent cold without cracking through an angle of 180 and closed flat. Element% min.max. Carbon0.030 Silico
14、n0.21.0 Manganese0.52.0 Phosphorus0.035 Sulphur0.025 Chromium16.518.5 Molybdenum2.253.0 Nickel11.014.0 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS S 537:1970 2 BSI 30 May 2003 8 Intercrystalline corrosio
15、n test 8.1 A bend test piece shall be selected by the inspector to represent each batch. The test piece shall be heated for 30 minutes at a temperature of 650 10 C and cooled in air. It shall then be immersed for 72 hours in a boiling solution having the following composition: 111 g copper sulphate
16、crystals (CuSO45H2O). 98 g concentrated sulphuric acid (specific gravity 1.84) made up to 1 litre with distilled water. Precautions shall be taken during boiling to prevent concentration due to evaporation. 8.2 The test piece treated in accordance with 8.1 shall be subjected to, and meet the require
17、ments of, the single bend test in accordance with Clause 7 3). 9 Microscopic examination for freedom from surface contamination 9.1 Sample selection 1) Sheet and strip. The inspector shall select one sample from each of 10 % of the sheets or strips from each batch. 2) Coil. The inspector shall selec
18、t one sample from each end of each coil. 9.2 Each sample selected in accordance with 9.1 shall be heated for 30 minutes at 650 C and cooled in air. A section shall then be taken from each sample and shall be mounted in such a manner that the edge of specimen is adequately supported during preparatio
19、n, and shall then be polished and etched electrolytically in 10 % oxalic acid or 10 % chromic acid. 9.3 Each section prepared in accordance with 9.2 shall be examined at a magnification of approximately 200 diameters and shall be free from carburization, oxide penetration, oxidation and other surfac
20、e or sub-surface contamination. 10 Retests 10.1 Intercrystalline corrosion. If any piece fails to meet the requirements of 8.2 the inspector shall adopt one or both of the following procedures as requested by the manufacturer. 1) Select two further test pieces from the batch one of which shall be ta
21、ken from the item originally sampled, unless that item has been withdrawn by the manufacturer. Both these further test pieces shall be treated in accordance with 8.1 and tested in accordance with, and meet the requirements of, 8.2. 2) Allow the batch to be re-heat-treated in accordance with Clause 6
22、 and tested in accordance with Clauses 7, 8 and 9. 10.2 Microscopic examination for freedom from surface contamination. If any sample fails to meet the requirements of 9.3 the inspector shall agree a retest procedure with the Inspecting Authority. 0.2 % proof stressTensile strengthElongation on thic
23、kness Less than 1.5 mm1.5 to 3.0 mmOver 3.0 mm MPaMPa% min.min.max.min.min.min. 190500700303540 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:06:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: London South Bank University, London South Ba
24、nk University, Sat Dec 09 03:06:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS S 537:1970 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and
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